— Have you seen Michael recently ?— Yes, in fact I saw him this morning. I ____ him for two years. 

 My uncle from Hongkong has changed so much that I could hardly ________ him at the airport. 

 Some kinds of animals can _______ the colour of their surroundings.

 I had hoped to get to the meeting, but I found at the last minute that I couldn’t ________ it. 

The ___ look on his face suggested that he ____ so.